Nobody's gonna know nada about Eagles out there. You're pretty much on your own wiring up a stereo in one. That said, and it being an 80 model, are you wanting to put in a newer style stereo with whats referred to as a DIN mount(modern CD/MP3/input units)? That'll require you to cut up the dash center unless you locate one from an '86 or newer Eagle(or was it as early as '84, I don't remember), which came with a DIN mount stereo. If the car has its stock AM/FM radio, just trace the wires for power and ground. If its just the AM/FM, then it probably has just one speaker located above the glove box, which is useless and can be abandoned(wiring and all), so you'll have to pull your own speaker wires to the doors and back areas, and probably have to fabricate your own speaker mounts for those locations. These cars have a bunch of tricky/hidden dash screws, and its not much fun doing the install. If you don't have a DIN style mount to use, the one from an XJ Cherokee can be made to work, but lacks a tab on top that the Eagle din mount has. One can be riveted onto the XJ mount. I might be able to find some pictures to help.